This subject comes up here every few months. Folks using it must learn by their mistakes with it. Make no mistakes& you are off the hook. Make a mistake & your bore will turn to rust.

Once you make a rifle-storing preparation mistake with Bore Butter, I can guarantee you that you will never use it again.

Use gun oils for best protection. Use gun oils because they allow you to make moisture-barrel preparation mistakes & the bore still will not rust while checking it periodically.